Table 2.

Wearable and nonwearable sensors used in the Tracking Individual Performance with Sensors (TILES) study.

Type of sensor		Description of sensor	Frequency of wear (if applicable)	Data collected from sensor
Wearable sensors
	Fitbit Charge 2 (FitBit)	Wrist-worn sensor; requires companion Fitbit phone app	24 hours a day for 10 weeks	Heart rate; step count; sleep duration
	OM signal (OM signal)	Chest garment (bra for women, shirt for men) with clip-on box to collect data; requires companion OM signal app	Worn for the duration of a participant’s work shift over the course of 10 weeks	Electrocardiogram; breathing rate, depth; body motion
	Jelly phone (Unihertz)	Small Android phone that can be clipped onto participant’s clothing as a badge	Worn for the duration of a participant’s work shift over the course of 10 weeks	Audio features (eg, duration of speech and intonation)
Nonwearable sensors
	S1 Minew beacon (Minew)	Environmental sensor that can be placed in different rooms; communicates with Owl-in-One sensor	No participant interaction with this sensor is required	Temperature; humidity
	i7-Rock Minew beacon (Minew)	Environmental sensor that can be attached to doors or placed in different rooms; communicates with Owl-in-One sensor	No participant interaction with this sensor is required	Motion
	E6 Minew beacon (Minew)	Environmental sensor that can be placed in different rooms; communicates with Owl-in-One sensor	No participant interaction with this sensor is required	Light level
	Owl-in-One (reelyActive)	Environmental sensor that plugs into an outlet; tracks participant proximity using Bluetooth pings from the Fitbit Charge 2	Plugged into different rooms within the hospital where participants spent most of their time; no participant interaction with these sensors was required	Participant proximity